image swiping not working in android view pager

image swiping not working in android view pager - android

I want to create an app which swipe images left/right so i use viewPager for this i run this code it gets run successfully but blank screen comes nothing happens.
This is my homeSwipe Class
public class homeSwipe extends Activity {
ViewPager viewPager;
customPagerAdapter customPagerAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_swipe);
viewPager = (ViewPager) findViewById(R.id.pager);
customPagerAdapter = new customPagerAdapter(homeSwipe.this);
viewPager.setAdapter(customPagerAdapter);
}
}
that is my layout.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/pager">
</android.support.v4.view.ViewPager>
</RelativeLayout>
This is my customPagerAdapter class
public class customPagerAdapter extends PagerAdapter {
private int imgres[] ={R.drawable.graypatternbackground,R.drawable.home,R.drawable.homescreen,R.drawable.redwall};
private Context context;
private LayoutInflater layoutInflater;
public customPagerAdapter(Context context){
this.context =context;
}
#Override
public int getCount() {
return imgres.length;
}
#Override
public boolean isViewFromObject(View view, Object object) {
return (view == (LinearLayout)object);
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
layoutInflater = (LayoutInflater)context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
View item_view =(View)layoutInflater.inflate(R.layout.swipelayout,container,false);
ImageView imgView = (ImageView)item_view.findViewById(R.id.imageView);
imgView.setImageResource(imgres[position]);
return item_view;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((LinearLayout)object);
}
}
This is my swipelayout.xml file
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/imageView"/>
</LinearLayout>

This is custompagerAdapter.
import android.support.v4.app.Fragment;import android.support.v4.app.FragmentManager;import android.support.v4.app.FragmentStatePagerAdapter;public class PropTypePagerAdapter extends FragmentStatePagerAdapter { int noOfTab; public PropTypePagerAdapter(FragmentManager fm ,int noOfTab) { super(fm); this.noOfTab=noOfTab; } #Override public Fragment getItem(int position) { switch (position) { case 0: return new PropTabType(0); case 1: return new PropTabType(1); case 2: return new PropTabType(2); case 3: PropTabType service = new PropTabType(3); return service; } } #Override public int getCount() {
return noOfTab;
}
}
And this is logic for swapping image
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {view = inflater.inflate(R.layout.fragment_prop_type_tab,container, false);fragImg = (ImageView) view.findViewById(R.id.fragImg); if (position == 0) { fragImg.setImageResource(R.drawable.buy); } else if (position == 1) { fragImg.setImageResource(R.drawable.rent1); } else { fragImg.setImageResource(R.drawable.hostel); } return view; }

Related

getItem function calling twice in FragmentStatePagerAdapter?

I Have a problem with getItem() function why because it is called twice in FragmentStatePagerAdapter class.
Actually the main reason is in application having TextoSpeech functionality so getItem() function twice the text also speech twice. This is my code can u please assist me....Great thanks in advance.
Here is the code
This is MainActivity class:
public class MainActivity extends FragmentActivity{
PagerFragment pagerFragment;
Cursor mCursor;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.rhymes_activity_main);
DBUtils utils = new DBUtils(getApplicationContext());
new DBUtils(getApplicationContext());
try {
DBUtils.createDatabase();
} catch (IOException e) {
Log.w(" Create Db "+e.toString(),"===");
}
DBUtils.openDatabase();
mCursor = utils.getResult("select * from Cflviewpagerdata order by title");
final ArrayList<PageData> myList = new ArrayList<PageData>();
while (mCursor.moveToNext()) {
myList.add(new PageData(mCursor.getInt(
mCursor.getColumnIndex("_id")),
mCursor.getString(mCursor.getColumnIndex("title")),
mCursor.getString(mCursor.getColumnIndex("view"))));
}
mCursor.close();
ListView lv = (ListView) findViewById(R.id.list_view);
ListViewAdapter lva = new ListViewAdapter(this, R.layout.list_item, myList);
lv.setAdapter(lva);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//peace of code that create launch new fragment with swipe view inside
PagerFragment pagerFragment = new PagerFragment();
Bundle bundle = new Bundle();
bundle.putInt("CURRENT_POSITION", position);
bundle.putParcelableArrayList("DATA_LIST", myList);
pagerFragment.setArguments(bundle);
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction ft = fragmentManager.beginTransaction();
ft.replace(R.id.container, pagerFragment, "swipe_view_fragment").commit();
}
});
DBUtils.closeDataBase();
}
#Override
public void onBackPressed() {
FragmentManager fm = getSupportFragmentManager();
Fragment f = fm.findFragmentByTag("swipe_view_fragment");
if(f!=null){
fm.beginTransaction().remove(f).commit();
}else{
super.onBackPressed();
}
}
}
This is PagerFragment class:
public class PagerFragment extends Fragment{
private ArrayList<PageData> data;
private int currentPosition;
private String mTitle;
private FragmentActivity context;
#Override public void onAttach(Activity activity) {
context = (FragmentActivity) activity;
super.onAttach(activity);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_pager, container, false);
ViewPager mViewPager = (ViewPager) v.findViewById(R.id.pager_view);
currentPosition = getArguments().getInt("CURRENT_POSITION");
mTitle = getArguments().getString("T_TITLE");
data = getArguments().getParcelableArrayList("DATA_LIST");
FragmentItemPagerAdapter fragmentItemPagerAdapter = new FragmentItemPagerAdapter(getFragmentManager(), data);
mViewPager.setAdapter(fragmentItemPagerAdapter);
mViewPager.setCurrentItem(currentPosition);
return v;
}
}
This is FragmentItemPagerAdapter class:
public class FragmentItemPagerAdapter extends FragmentStatePagerAdapter{
private static ArrayList<PageData> data;
public FragmentItemPagerAdapter(FragmentManager fm, ArrayList<PageData> data){
super(fm);
this.data = data;
}
#Override
public Fragment getItem(int position) {
Fragment fragment = new PageFragment();
Bundle args = new Bundle();
args.putString(PageFragment.TITLE, data.get(position).getTitle());
args.putString(PageFragment.DESCRIPTION, data.get(position).getDes());
args.putInt("CURRENT_POSITION", position);
fragment.setArguments(args);
return fragment;
}
void deletePage(int position) {
if (canDelete()) {
data.remove(position);
notifyDataSetChanged();
}
}
boolean canDelete() {
return data.size() > 0;
}
#Override
public int getItemPosition(Object object) {
// refresh all fragments when data set changed
return PagerAdapter.POSITION_NONE;
}
#Override
public int getCount() {
return data.size();
}
public static class PageFragment extends Fragment implements OnInitListener{
public static final String TITLE = "title";
public static final String DESCRIPTION = "view";
String om;
TextToSpeech tts;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_item, container, false);
((TextView) rootView.findViewById(R.id.item_label)).setText(getArguments().getString(TITLE));
View tv = rootView.findViewById(R.id.item_des);
((TextView) tv).setText(getArguments().getString(DESCRIPTION));
Bundle bundle = getArguments();
int currentPosition = bundle.getInt("CURRENT_POSITION");
tts = new TextToSpeech( getActivity(), PageFragment.this);
om = data.get(currentPosition).getDes();
tts.speak(om, TextToSpeech.QUEUE_FLUSH, null);
return rootView;
}
#Override
public void onDestroy() {
if (tts != null) {
tts.stop();
tts.shutdown();
}
super.onDestroy();
}
public void onInit(int status) {
// TODO Auto-generated method stub
if (status == TextToSpeech.SUCCESS) {
tts.speak(om, TextToSpeech.QUEUE_FLUSH, null);
}
}
}
}
This is PageData class:
This class is Object class
public class PageData implements Parcelable{
private String title;
private String view;
public PageData(){
}
public PageData(Parcel in){
title = in.readString();
view = in.readString();
}
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(title);
dest.writeString(view);
}
public PageData(int picture, String title, String description){
this.title = title;
this.view = description;
}
public String getTitle() {
return title;
}
public String getDes() {
return view;
}
}
This is Xml code
fragment_item.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="8dp"
android:orientation="vertical">
<TextView
android:id="#+id/item_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="10sp"
android:text="Image Name"
android:textColor="#android:color/black"
android:textSize="18sp"
android:layout_gravity="center_horizontal" />
<TextView
android:id="#+id/item_des"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="10sp"
android:text="Image Name"
android:textColor="#android:color/black"
android:textSize="18sp"
android:layout_gravity="center_horizontal" />
</LinearLayout>
This is fragment_pager.xml: This is viewpager layout
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff">
<android.support.v4.view.ViewPager
android:id="#+id/pager_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
This is rhymes_activity_main.xml: This is for listview of application.
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView android:scrollbarAlwaysDrawVerticalTrack="true"
android:id="#+id/list_view"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</FrameLayout>
This images are my application look
This image is logcat of my application
Highlighted is my problem.
This is my code can you please help me any one.
I am new one of Android so please help

FragmentStatePagerAdapter preloads always at least 1 page.
You can try to use setUserVisibleHint to handle your logic only for visible fragment:
#Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if (isVisibleToUser) {
// Your code
}
}

How to convert ViewPager implementation using Data binding?

MainActvity:
public class MainActivity extends AppCompatActivity {
private static int currentPage = 0;
private static int NUM_PAGES = 0;
CirclePageIndicator indicator;
int Imageitems[] = {R.drawable.hike, R.drawable.hike, R.drawable.hike};
final ArrayList<Integer> imageItems = new ArrayList<>();
ViewPager mPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mPager = (ViewPager) findViewById(R.id.pager);
indicator = (CirclePageIndicator)
findViewById(R.id.indicator);
for (int i = 0; i < Imageitems.length; i++) {
imageItems.add(Imageitems[i]);
}
ImageSlider(imageItems);
}
private void ImageSlider(ArrayList<Integer> ImagesArray) {
mPager.setAdapter(new Item_SlidingImage_Adapter(this, ImagesArray));
indicator.setViewPager(mPager);
final float density = getResources().getDisplayMetrics().density;
indicator.setRadius(5 * density);
NUM_PAGES = ImagesArray.size();
// Auto start of viewpager
final Handler handler = new Handler();
final Runnable Update = new Runnable() {
public void run() {
if (currentPage == NUM_PAGES) {
currentPage = 0;
}
mPager.setCurrentItem(currentPage++, true);
}
};
Timer swipeTimer = new Timer();
swipeTimer.schedule(new TimerTask() {
#Override
public void run() {
handler.post(Update);
}
}, 3000, 3000);
// Pager listener over indicator
indicator.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int position) {
currentPage = position;
}
#Override
public void onPageScrolled(int pos, float arg1, int arg2) {
}
#Override
public void onPageScrollStateChanged(int pos) {
}
});
}
}
layout:
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".MainActivity">
<data>
</data>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<RelativeLayout
android:id="#+id/relativelayout1"
android:layout_width="match_parent"
android:layout_height="150dp"
>
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:addOnPageChangeListener="#{data.pageChangeListener}"
app:currentItem="#{data.currentPage}"
app:adapter="#{image_adapter}"
/>
<com.viewpagerindicator.CirclePageIndicator
android:id="#+id/indicator"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:padding="5dp"
app:centered="true"
app:fillColor="#ff0099"
app:pageColor="#FF0000"
app:radius="#{data.density}"
app:snap="false" />
</RelativeLayout>
</LinearLayout>
</layout>
adapter:
public class Item_SlidingImage_Adapter extends PagerAdapter {
private ArrayList<Integer> IMAGES;
private LayoutInflater inflater;
private Context context;
public Item_SlidingImage_Adapter(Context context, ArrayList<Integer> IMAGES) {
this.context = context;
this.IMAGES = IMAGES;
inflater = LayoutInflater.from(context);
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
#Override
public int getCount() {
return IMAGES.size();
}
#Override
public Object instantiateItem(ViewGroup view, final int position) {
View imageLayout = inflater.inflate(R.layout.slidingimages_layout, view, false);
assert imageLayout != null;
final ImageView imageView = (ImageView) imageLayout
.findViewById(R.id.image);
imageView.setImageResource(IMAGES.get(position));
view.addView(imageLayout, 0);
return imageLayout;
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view.equals(object);
}
#Override
public void restoreState(Parcelable state, ClassLoader loader) {
}
#Override
public Parcelable saveState() {
return null;
}
}
item.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="1dip" >
<ImageView
android:id="#+id/image"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:adjustViewBounds="true"
android:layout_gravity="center"
android:scaleType="fitXY" />
</FrameLayout>
Using given code I am able to auto flip in ViewPager and also using manually with some delay. I have to convert same code using Databinding; I tried but I am not able to understand how to set adapter,currentitem, and on page change listener how I will set value in xml?
How can I convert existing code for databinding in Android?

android TabLayout and ViewPager does not work in Fragment

First of all, I searched a lot, but the solutions are not worked, so I am here for help. the design lib used is 23.1.1
//MainActivity
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
// main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<fragment
class = "com.tablayoutfragmenttest.FragmentTest"
android:id="#+id/hahah"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
// Fragment
public class FragmentTest extends Fragment {
private TabLayout mTablayout;
private ViewPager mVp;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View v = inflater.inflate(R.layout.fragment, container, false);
mTablayout = (TabLayout)v.findViewById(R.id.bizfrag_tabs_id);
mTablayout.setTabMode(TabLayout.MODE_SCROLLABLE);
mVp = (ViewPager)v.findViewById(R.id.bizfrag_vp_id);
mVp.setAdapter(new MyAdapter(getChildFragmentManager()));
mVp.setOffscreenPageLimit(0);
//mTablayout.setupWithViewPager(mVp);
//mTablayout.post(new Runnable() {
// #Override
// public void run() {
// if (ViewCompat.isLaidOut(mTablayout)) {
// mTablayout.setupWithViewPager(mVp);
// } else {
// mTablayout.addOnLayoutChangeListener(
// new View.OnLayoutChangeListener() {
// #Override
// public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
// mTablayout.setupWithViewPager(mVp);
//
// mTablayout.removeOnLayoutChangeListener(this);
// }
// });
// }
// }
// });
return v;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
mTablayout.post(new Runnable() {
#Override
public void run() {
mTablayout.setupWithViewPager(mVp);
}
});
}
}
//fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent"
android:orientation="vertical">
<android.support.design.widget.TabLayout
android:id="#+id/bizfrag_tabs_id"
android:layout_width="match_parent"
android:layout_height="40dp"/>
<android.support.v4.view.ViewPager
android:id="#+id/bizfrag_vp_id"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
//ViewPager's adapter
public class MyAdapter extends FragmentStatePagerAdapter {
public static String[] totalPossibleTabs = new String[]{"this is tab0", "this is tab1", "this is tab2", "this is tab3", "this is tab4", "this is tab5", "this is tab6", "this is tab7", "this is tab8", "this is tab9"};
public MyAdapter(FragmentManager fm){
super(fm);
}
#Override
public Fragment getItem(int position) {
return new Fragment();
}
#Override
public int getCount() {
return totalPossibleTabs.length;
}
#Override
public CharSequence getPageTitle(int position) {
return totalPossibleTabs[position];
}
}
when I run the app, and swipe the page, the problem is as follows:
the tab's indicator is in wrong position

Try this:-
if (ViewCompat.isLaidOut(tabLayout)) {
mTablayout.setupWithViewPager(viewPager);
} else {
tabLayout.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
#Override
public void onLayoutChange(...) {
mTablayout.setupWithViewPager(viewPager);
mTablayout.removeOnLayoutChangeListener(this);
}
});
}
instead of:-
mTablayout.post(new Runnable() {
#Override
public void run() {
mTablayout.setupWithViewPager(mVp);
}
});

Thank you all guys, I finally find the point,
we just cannot use
new Fragment();
in this case for simplicity,
change it to your own Fragment.

How to display video in VideoView in the center of the screen?

I am creating ViewPager with two VideoViews. On sliding pages, video on current page start playing. One problem: how to display video in VideoView in the center of the screen ?
Here is my code,
MainActivity.java:
public class MainActivity extends Activity{
private class MyViewPagerAdapter extends PagerAdapter implements ViewPager.OnPageChangeListener
{
private Vector<View> pages;
private ViewGroup myContainer;
private int currentPageId;
private boolean flag;
public MyViewPagerAdapter(Context context, Vector<View> pages)
{
this.pages=pages;
}
#Override
public int getCount()
{
return pages.size();
}
#Override
public Object instantiateItem(ViewGroup container, int position)
{
flag = true;
currentPageId = 0;
int positionNow = myPager.getCurrentItem();
View page = pages.get(position);
container.addView(page);
myContainer = container;
if(positionNow == position)
StartVideo(container, positionNow);
return page;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object)
{
container.removeView((View) object);
myContainer = container;
}
#Override
public boolean isViewFromObject(View view, Object object)
{
return view.equals(object);
}
#Override
public void onPageScrollStateChanged(int arg0)
{
if(flag)
{
MyVideoView currVideo = (MyVideoView) myContainer.getChildAt(currentPageId+1);
if(currVideo != null)
if(currVideo.getVideoPath() != null)
currVideo.pause();
}
else
flag = !flag;
}
#Override
public void onPageSelected(int arg0)
{
flag = false;
currentPageId = myPager.getCurrentItem();
StartVideo(myContainer, myPager.getCurrentItem());
}
private void StartVideo(ViewGroup container, int position)
{
View page = container.getChildAt(position+1);
MyVideoView curVideo = (MyVideoView) page;
Log.d("Andrew", curVideo.getVideoPath());
curVideo.start();
}
}
private ViewPager myPager;
private MyViewPagerAdapter myAdapter;
private Vector<View> pages;
private MyVideoView myVideoView;
int currentPage, previousPage;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pages = new Vector<View>();
for(int i=1; i <= 2; i++)
{
myVideoView = new MyVideoView(this);
myVideoView.setVideoPath("videoPath");
pages.add(myVideoView);
}
this.myAdapter = new MyViewPagerAdapter(this, pages);
this.myPager = (ViewPager) this.findViewById(R.id.viewpageronecard);
this.myPager.setAdapter(myAdapter);
myPager.setOnPageChangeListener(myAdapter);
myPager.setOffscreenPageLimit(1);
myPager.setCurrentItem(0);
}
}
activity_main.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<android.support.v4.view.ViewPager
android:id="#+id/viewpageronecard"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:background="#222222" >
</android.support.v4.view.ViewPager>
</RelativeLayout>

Although it is an old question, perhaps someone else is struggling with it, too, as I had the same problem. I solved it by changing
android:layout_centerInParent="true"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
to
android:layout_gravity="center"
in the xml for the VideoView I used to populate the ViewPager.

padding_medium cannot be resolved or is not a field error

I have a view pager to view images in Swipe horizontal fashion. I am populating view pager with my ImageFragmentAdapter class which extends FragmentPagerAdapter. In my ImageFragmentAdapter .java, i am gettin an error in this line
int padding = context.getResources().getDimensionPixelSize(R.dimen.padding_medium);
Error is : padding_medium cannot be resolved or is not a field
I just googled about the issue, I came to know that i should add this line to imports.
import your.application.packagename.R;
But still i get error on this line. can anyone tell what is the problem.?
ImageFragmentAdapter .java
public class ImageFragmentAdapter extends FragmentPagerAdapter implements
IconPagerAdapter
{
private int[] CONTENT = new int[] {
R.drawable.gallery_photo_1,
R.drawable.gallery_photo_2,
R.drawable.gallery_photo_3,
R.drawable.gallery_photo_4
};
protected static final int[] ICONS = new int[] { R.drawable.marker,
R.drawable.marker, R.drawable.marker, R.drawable.marker };
private int mCount = CONTENT.length;
public ImageFragmentAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
return ImageFragment.newInstance(CONTENT[position % CONTENT.length]);
}
#Override
public int getCount() {
return mCount;
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
Context context = MainActivity.appContext;
ImageView imageView = new ImageView(context);
int padding = context.getResources().getDimensionPixelSize(
R.dimen.padding_medium);//error//
imageView.setPadding(padding, padding, padding, padding);
imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
imageView.setImageResource(CONTENT[position]);
((ViewPager) container).addView(imageView, 0);
return imageView;
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view == ((ImageView) object);
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((ImageView) object);
}
/*
#Override
public CharSequence getPageTitle(int position) {
return ImageFragmentAdapter.CONTENT[position % CONTENT.length];
}
*/
#Override
public int getIconResId(int index) {
return ICONS[index % ICONS.length];
}
public void setCount(int count) {
if (count > 0 && count <= 10) {
mCount = count;
notifyDataSetChanged();
}
}
}
I use DetailsFragment.java to populate the View pager onto fragment_details.xml
public class DetailsFragment extends SherlockFragment
{
public static final String TAG = "detailsFragment";
ImageFragmentAdapter mAdapter;
ViewPager mPager;
PageIndicator mIndicator;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
//container.removeAllViews();
// TODO Auto-generated method stub
View view = inflater.inflate(R.layout.fragment_details, container,
false);
mAdapter = new ImageFragmentAdapter(getActivity().getSupportFragmentManager());
mPager = (ViewPager) view.findViewById(R.id.pager);
mPager.setAdapter(mAdapter);
mIndicator = (CirclePageIndicator) view.findViewById(R.id.indicator);
mIndicator.setViewPager(mPager);
return view;
}
}
fragment_details.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" />
<com.viewpagerindicator.CirclePageIndicator
android:id="#+id/indicator"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="10dip" />
</LinearLayout>

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

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